Grace Coring are Australian owned specialists in undisturbed soil sampling. Improving best available information for Engineers, Designers and Asset Managers

Undisturbed core sample Undisturbed core sample

Undisturbed core sample

Hwy Shoulder Widening Investigations Hwy Shoulder Widening Investigations

Hwy Shoulder Widening Investigations

Reinstating Hole Compacted In Lifts Reinstating Hole Compacted In Lifts

Reinstating Hole Compacted In Lifts

Highway 1m to 6m profile sampling Highway 1m to 6m profile sampling

Highway 1m to 6m profile sampling

About Us

Grace Coring was founded by Tim Fragar and this business operates under our PTY LTD company of 26 years.  Our investigation and development of this service was borne out of an identified need for fast, accurate and cost effective sub-surface knowledge.  This service is available for State Authorities, councils and the construction industry more generally. Key goals were to reduce cost, reduce WHS risk, reduce ENV risk, increase knowledge and improve confidence. We believe our goals have been achieved through the use our "snap shot"technology/methodology. Improving on what constitutes best available information.

Highway existing pavement and shoulder sampling. Base and subgrade 1-20 metre geo dependent. 


Our system reduces current investigation staffing and plant required.  WHS risks both in terms of transit to site and highway site exposure are greatly reduced. 

Utilising our "snap shot" methodology, our estimates are that a conservative 60% reduction in exposure is achieved, with reduced associated costs.  Added to this are the capital costs and risks of heavy plant mobilisation.

Extremely low surface invasion impacts with extremely low sample disturbance.

As demonstrated this far with trials and site work, we are able to take an undisturbed sample of pavements and subgrades not possible using traditional methods.  Layer placements remain intact and undisturbed.  Accurate moisture profiling is also now easily achieved allowing a more forensic approach to moisture related pavement failures. 

Is the moisture ingress from top down, lateral or is it capillary rise?  Greater depths are easily achieved and provide greater insight into subgrades with implications for pavement design. Drainage associated factors can be annalysed through moisture profiling. Service risks associated with sub-grade variability are also an important consideration.

Accurate layer placements, undisturbed with moisture intact, sealed, tagged and ready for shipment to soil lab.

The benefits environmentally we see are primarily but not only, realted to non-target are disturbance and settlement of investigation pits.

We estimate a direct capital cost saving of around 40% of existing.  We'd maintain that associated cost implications are more significant than direct capital costs.  What are the WHS exposure costs?  What are the costs associated with inaccuracy and poor data?  What component of a projects cost is environnmental risk monitoring and control?